Pipe coating scratch tester

Paint and varnish scratch resistance tester, also known as scratch resistance tester or balanced scratch rod adhesion resistance tester, is suitable for the scratch resistance evaluation of single coating or composite coating system of insulating color coated board. The scratch resistance of the coating is assessed according to the maximum weight of the spherical steel needle whether it scratches the coating or the steel needle does not scratch the coating.

The scratch resistance tester of paint and varnish is suitable for the evaluation of scratch resistance of single coating or composite coating system of insulating color coated board, and the scratch resistance of coating is assessed by the maximum weight of spherical steel needle under a certain weight whether the coating is scratched or the steel needle is not scratched. The paint and varnish scratch resistance tester conforms to ISO1518, BS3900, ASTM D5178 and ASTM D2197 standards. The conductor substrate can display the scratched and unscratched curve on the screen in real time, and the test result is directly displayed on the screen: scratched or unscratched.

Application

(1) Pipe Coatings: Evaluation of protective coating samples prepared from coated pipes, subject to specimen and fixture compatibility.

(2) Paint and Varnish: Scratch resistance evaluation of single-layer and multi-layer coating systems.

(3) Color-Coated Boards: Assessment of the scratch resistance of coated board surfaces.

(4) Protective Coatings: Comparative evaluation of coatings designed to resist surface damage.

(5) Industrial Coating Quality Control: Inspection of coating performance during product development and manufacturing.

(6) Coating Research: Comparison of different coating formulations and surface treatments under controlled loading conditions.

The appropriate test load, stylus geometry, travel speed, and evaluation criteria should be selected according to the coating type and applicable test method.

Standards

(1) ISO 1518-1:2023 — Paints and varnishes — Determination of scratch resistance — Part 1: Constant-loading method. This standard evaluates coating resistance to penetration using a scratch stylus under a specified load.

(2) ISO 1518-2:2019 — Paints and varnishes — Determination of scratch resistance — Part 2: Variable-loading method. This method uses a pointed stylus with a continuously increasing load to compare the scratch resistance of coating systems.

(3) ASTM D5178-21(2026) — Standard Test Method for Mar Resistance of Organic Coatings. This method evaluates the resistance of organic coatings to surface marring and expresses results in terms of the force required to produce a mark.

(4) ASTM D2197-16(2022) — Standard Test Method for Adhesion of Organic Coatings by Scrape Adhesion. This is a related coating evaluation method, but it assesses scrape adhesion rather than scratch resistance and should not be treated as interchangeable with a scratch test.

(5) BS 3900-E2:1970 — Historical British scratch test standard for paints. This edition was withdrawn in 1992 and should not be presented as a current standard.

Technical parameters:

* Speed :1-120 mm/sec(adjustable)

* Travel :100 mm

* Power supply :220 V/50 HZ

* Standard steel ball needle diameter :1mm, 1.6mm steel ball needle can be purchased

* Standard weight :200g, 500g, 2000g each 1,50g, 100g, 1000g each 2 (can be purchased on request)

Features

(1) Adjustable Testing Speed: Supports testing speeds from 1 to 120 mm/s.

(2) Defined Test Stroke: A 100 mm travel distance supports controlled scratch testing.

(3) Replaceable Steel Ball Stylus: A 1 mm steel ball stylus is specified as standard, with a 1.6 mm option available.

(4) Selectable Test Loads: Different weights allow evaluation under different loading conditions.

(5) Scratch Resistance Evaluation: Helps identify whether a coating withstands a specified load without visible scratching or penetration.

(6) Result Display: The supplied description states that scratch/no-scratch status and the corresponding curve can be displayed in real time.

(7) Comparative Testing: Supports evaluation of coating performance under consistent testing conditions.